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MS51964-64 — Technical Data Sheet

✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The SETSCREW is a the manufacturer industrial component. Key specifications include head_style: HEADLESS (SETSCREW), point_style: CUP, thread_class: 3A A, fastener_length: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, hardness_rating: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL, thread_direction: RIGHT-HAND. This part is cataloged in the Federal Logistics Information System under NSN 5305-00-724-5811, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MS51964-64
NSN: 5305-00-724-5811
FSC: 5305
CAGE: 80205 — NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE (USA)
SPECIFICATIONS
materialSTEEL COMP 4032 OR STEEL COMP 4037 OR STEEL COMP 4137 OR STEEL COMP 4140 OR STEEL COMP 8630 OR STEEL COMP 8740 OVERALL
head_styleHEADLESS (SETSCREW)
point_styleCUP
thread_class3A A
fastener_length0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
hardness_rating45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
thread_directionRIGHT-HAND
surface_treatmentZINC AND CHROMATE OVERALL
width_across_flats0.125 INCHES NOMINAL IN
internal_drive_styleHEXAGON
nominal_thread_diameter0.250 INCHES IN
thread_quantity_per_inch28
NSN5305-00-724-5811
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: MS51964-64 · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
THREAD SERIES DESIGNATOR: UNF
•
SURFACE TREATMENT: CADMIUM AND CHROMATE OVERALL
•
NOMINAL THREAD DIAMETER: 0.250 INCHES IN
•
WIDTH ACROSS FLATS: 0.125 INCHES NOMINAL IN
•
THREAD QUANTITY PER INCH: 28
•
MATERIAL DOCUMENT AND CLASSIFICATION: 66 FED STD ALL MATERIAL RESPONSES OVERALL
•
HARDNESS RATING: 45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
TECHNICAL CHARACTERISTICS
THREAD SERIES DESIGNATORUNF
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
END ITEM IDENTIFICATIONMULTIPLE LAUNCH ROCKET SYSTEM (MLRS)
NOMINAL THREAD DIAMETER0.250 INCHES IN
WIDTH ACROSS FLATS0.125 INCHES NOMINAL IN
THREAD QUANTITY PER INCH28
MATERIAL DOCUMENT AND CLASSIFICATION66 FED STD ALL MATERIAL RESPONSES OVERALL
HARDNESS RATING45.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM OVERALL
THREAD DIRECTIONRIGHT-HAND
INTERNAL DRIVE STYLEHEXAGON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
E2391PC33InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
76R1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
4105PC252InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
AN565D428H4InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
PW5-200HMS10PCTInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
PW5-20OHMSPORM10PCTInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is MS51964-64?
MS51964-64 is a SETSCREW.
What parts can replace MS51964-64?
There are 10 known substitutes for MS51964-64: E2391PC33, 76R1, 4105PC252 and 7 more. Substitute compatibility should be verified for your specific system.
Is MS51964-64 still available?
MS51964-64 is currently cancelled.
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Last verified: October 2026